Practice

"Over time, if we see something that is similar, like we see a cat every day, a characteristic set of connections between neurons will form. Makes sense? See a cat, get a certain pattern of connections.
Over time. Doesn't happen after the first cat. It takes maybe, I don't know, a hundred cats, to meet the same cat, meet different cats.
You have this pattern of connectivity in the mind."

"Such that, the next time you see a cat, that same pattern of neurons is activated."

"Even better, the next time you see part of a cat, the patterns of neurons for the whole cat are fired."
(See Recognition)